The Evolution and Role of NH4Cl Flux Used to Synthesize Sr2SiO4:Dy3+ Phosphor by Solid-State Reaction Method

Two different Sr2SiO4:Dy3+ phosphors were successfully synthesized at 1000°C for 4 h using NH4Cl or SrCl2 as the flux, respectively. The luminescence intensity of Sr2SiO4:Dy3+ was enhanced 60 times by the addition of 5 wt% NH4Cl. The phase evolution and photoluminescence (PL) properties of the phosp...

Full description

Saved in:
Bibliographic Details
Published in:Journal of the American Ceramic Society 2012-12, Vol.95 (12), p.3871-3877
Main Authors: Zhang, Le, Lu, Zhou, Han, Pengde, Lu, Jiajia, Xu, Naicen, Wang, Lixi, Zhang, Qitu
Format: Article
Language:English
Subjects:
Carbonates
Ceramics
Differential scanning calorimetry
Evolution
Flux
Luminescence
Mathematical analysis
Phosphors
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Two different Sr2SiO4:Dy3+ phosphors were successfully synthesized at 1000°C for 4 h using NH4Cl or SrCl2 as the flux, respectively. The luminescence intensity of Sr2SiO4:Dy3+ was enhanced 60 times by the addition of 5 wt% NH4Cl. The phase evolution and photoluminescence (PL) properties of the phosphors were investigated by the calculation of phase equilibrium and the analysis of TG/DSC, XRD, SEM, and PL. The role of NH4Cl was proved to be attributed to the formation of SrCl2 at ~300°C. The flux NH4Cl or SrCl2 lowered the decomposition temperature of carbonate and promoted the preferential formation of α′ phase in the solid‐state reaction through accelerating the kinetics of the formation of Sr2SiO4 by enhancing diffusion with more liquid phase.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2012.05378.x